沙雅隆起早古生代差异构造演化和隆升分析
Differential tectonic evolution and uplift analysis of Early Paleozoic in Shaya Uplift
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摘要: 塔里木盆地沙雅隆起早古生代差异构造演化与隆升的认识仍比较薄弱,精细化研究难度较大。本文借助平衡剖面技术对古隆起内部差异构造演化进行了探讨;其次,结合趋势厚度法与沉积-波动分析法,研究了古隆起内部早古生代分期差异的构造隆升强度和立移规律。研究结果表明,加里东中期Ⅰ幕以来,塔里木北部挤压作用增强,在沙雅隆起东、西两端首先形成了斜坡的构造格局,剥蚀量也相对较大,英买力北部剥蚀量最大可达650m。加里东中期III幕,沙雅隆起整体活动强烈,中部哈拉哈塘和阿克库勒的构造变形最为强烈,剥蚀中心位于沙雅隆起中部和东部,剥蚀量为800~1000m。海西早期,沙雅隆起持续构造隆升,隆起中心有所迁移,中部和西端的构造隆升与变形最为强烈。Abstract: The differential tectonic evolution of the Shaya uplift in Tarim Basin is discussed by means of balanced profile technique. In addition, the trend thickness method and deposition-wave analysis method are used to study the differential uplift intensity and law of the early Paleozoic in the paleo uplift. Since the middle Caledonian act I, the compression in the north of Tarim has been strengthened, and the slope structure has been formed at the east and west ends of the Shaya uplift. The denudation amount is relatively large, and the maximum denudation amount in the north of Yingmaili can reach 650 m. During the middle Caledonian stage III, the shaya uplift was strongly active as a whole, and the tectonic deformation of Halahatang and Akkule in the middle was the most intense. The denudation center was located in the middle and east of Shaya uplift, and the denudation amount was 800-1000 m. In the early Hercynian period, the tectonic uplift of Shaya uplift continued, with migration in the center and the most intense tectonic uplift and deformation in the middle and west of the uplift.